OEM Carrier Integrated Furnace Control Board HK42FZ016 / 325878-751 for Model PG8UAA048111ADJA

This is the factory OEM Integrated Furnace Control Board for the Carrier PG8UAA048111ADJA gas furnace, carrying primary part number HK42FZ016 and its current OEM replacement designation 325878-751 (Integrated Furnace Control Board Kit). The IFC board is the brain of your furnace — it sequences ignition, monitors the flame sensor, controls the inducer and blower motors, manages the gas valve, and orchestrates humidifier and air cleaner outputs. When this board fails, symptoms range from a complete no-heat lockout and unresponsive thermostat calls to erratic blower behavior, repeated ignition attempts with no flame, or a steady fault LED code indicating a system lockout. Always read the fault blink code off your existing board before replacement to confirm diagnosis.

• Specs: Input: 98–132 VAC at 60 Hz | Igniter output: 5A at 120 VAC | Cool blower: 30A, 2 HP, 240 VAC | Heat blower: 5A, 1/2 HP, 240 VAC | Inducer motor: 4A (FLA), 8.0A (LRA) at 120 VAC | Compatible with 24 VAC standard thermostats | Onboard diagnostic LED fault codes
• OEM vs Generic: This listing is for the genuine Carrier OEM board (HK42FZ016 / 325878-751), factory-programmed with the exact timing sequences and safety lockout logic specified for the PG8UAA048111ADJA. Aftermarket boards may omit brownout protection, reverse polarity safeguards, or carry incorrect igniter timing — risking repeated nuisance lockouts or unsafe operation. OEM is the only choice for warranty compliance and long-term reliability.
• Install difficulty: 3/5 — Discharge all power and capacitors before opening the furnace cabinet. Photograph all wiring harness connections before disconnecting. The 325878-751 kit includes adapter harnesses for older-style board swaps. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter (to verify 24V control circuit). Static-sensitive component — handle by board edges only and avoid carpeted surfaces.
• Warranty & Shipping: 1-year OEM manufacturer warranty against defects. In stock — ships same business day from our warehouse. Fast, tracked delivery to get your furnace back online quickly.

Compatibility: Directly fits Carrier model PG8UAA048111ADJA and other Carrier, Bryant, and Payne fixed-speed furnace platforms that originally specified HK42FZ016. Note that 325878-751 is the current OEM superseding part and includes wiring adapter harnesses for seamless installation on legacy boards. Confirm your existing board's part number against your unit's data label before ordering. Our fitment team is available to verify compatibility before you buy — just ask.